William Reid “Bill” Eadie (born December 27, 1947) is an American retired professional wrestler who has competed under the names of Ax as part of Demolition and The Masked Superstar. He was a high school teacher and coach at Cambridge High School in Cambridge, Ohio, and at East Liverpool, Ohio.

Demolition is an American professional wrestling tag team most prominent during the late 1980s and early 1990s in the World Wrestling Federation (WWF, now WWE) made up of Ax (Bill Eadie), Smash (Barry Darsow), and later Crush (Brian Adams). In the WWF, Demolition were three-time WWF World Tag Team Champions, and hold the record for the most combined days as reigning champions with that championship. Their first reign with the WWF World Tag Team Championship is the fourth longest reign with any tag team championship in WWE history (behind Mark Coffey and Wolfgang’s reign with the NXT UK Tag Team Championship, The New Day’s reign with the WWE (Raw) Tag Team Championship and The Usos’ reign with the WWE SmackDown Tag Team Championship) and is the longest reign on record for that specific championship (which has been defunct since 2010).Beginning in 2007, Ax and Smash reunited for several appearances at various independent shows and legends conventions